Química Nova | |
Nióbia sintética modificada como catalisador na oxidação de corante orgânico: utilização de H2O2 e O2 atmosférico como oxidantes | |
Kele T. G. Carvalho1  Adilson C. Silva1  Luiz C. A. Oliveira1  Maraisa Gonçalves1  Zuy M. Magriotis1  | |
[1] ,Universidade Federal de Lavras Departamento de Química Lavras MG ,Brasil | |
关键词: niobia; ESI-MS; oxidation process; | |
DOI : 10.1590/S0100-40422009000600002 | |
来源: SciELO | |
【 摘 要 】
In this work synthetic niobia was used to promote the oxidation of methylene blue dye in aqueous medium. The niobia was characterized by N2 adsorption/desorption, XRD and TG measurements. The presence of reactive species on the niobia surface strongly increased the oxidation rate of the methylene blue dye. The reaction mechanism was studied by ESI-MS suggesting that the oxidation of the organic dye involve oxidizing species generated mainly after previous treatment with H2O2. It can be observed that the catalyst is a good material in the activation of gas (atmospheric oxygen) or liquid (hydrogen peroxide) oxidant agent with a total discoloration of the dye solution after only 1 h of reaction.
【 授权许可】
CC BY-NC
All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License
【 预 览 】
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